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4. On the opposite-drive-end side, unscrew the split line screws in
the bearing liners. Screw in two lifting eyes in the top, and lift
the top half off the bearing liners.
5. Lift the shaft up slightly (about 0.015 to 0.25 inch) on both ends
of the rotor to the point where the shaft and bottom half of the
bearing liner do not touch each other.
6. Place shims between the rotor and the stator the thickness of the
air gap. Lower the shaft.
7. On the opposite-drive-end side, remove the bottom halves of the
bearing liners.
8. Rotate the bottom half of the liner 180º so it is facing upward
(where the top half of the liner was). Move the shaft as
necessary. Slide the liner forward so it rests on the bottom
bearing housing’s top surface.
9. Use lifting eyes and hoist to remove the liner.
10. Remove the bottom half of the bearing housings from the frame.
11. Remove the opposite-drive end bearing bracket and air baffle.
Float Out the Rotor:
1. Fit a pipe over the shaft. Depending upon the space available,
you may have to use a pipe that can be assembled, adding an
additional piece during each stage of movement outward.
2. Attach slings around the pipe on one end and around the shaft on
the opposite end.
3. Lift up the rotor, and move it out, gently resting the rotor on the
stator as the slings are moved down the pipe for the next lifting
stage. (See figure 23).
4. Remove the drive-end side bearing liners from the shaft.
Figure 21 Float the Rotor
CAUTION:
Be careful to not
damage running surfaces.
WARNING:
Before transport or
lifting bearing components, check if the
eye bolts are tight. Insecure eyebolts
could result in the part coming loose
and falling. Make sure the eyebolts are
not exposed to bending stress, otherwise
they could break. Make sure the lifting
equipment does not contact the seal and
running surfaces of the shaft.
CAUTION:
Make sure the RTD is
removed before rotating the bearing liner.
NOTE:
On the DE side, you can remove the
bearing liners after the rotor has been
removed.
CAUTION:
Make sure the pipe is
strong enough to support the weight of
the rotor and that it does not have rough
edges on the inside, which could damage
the shaft. To prevent tension on the shaft,
put slings around the largest shaft step
possible. Make sure the rotor does not hit
the stator.
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